JAMB Biology 2019 Objective — Question 17
Question 17 of 40 from the Joint Admissions and Matriculation Board (JAMB) Biology 2019 Objective paper, with the correct answer and a full explanation.
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Which of the following parts of the leaf possesses air spaces?
- A. upper epidermis
- B. lower epidermis
- C. palisade mesophyll
- D. spongy mesophyllCorrect
Explanation
The mesophyll (between the upper and lower epidermis) is divided into the tightly-packed palisade mesophyll (main site of photosynthesis) and the loosely-arranged spongy mesophyll, which functions in gaseous diffusion via its air spaces.
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